Patents by Inventor Kei Mitsuyasu
Kei Mitsuyasu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9699851Abstract: A dimming lighting circuit includes: a rectifier circuit; a phase detection circuit which outputs a dimming signal having a signal level corresponding to a conduction phase angle of an AC voltage; and a DC-DC converter which receives a DC voltage output from the rectifier circuit and supplies a light source with a DC current corresponding to the signal level of the dimming signal output from the phase detection circuit. If the conduction phase angle detected when the dimming lighting circuit receives the AC voltage at power-on is less than or equal to a predetermined angle, the phase detection circuit outputs, as the dimming signal, a substitute signal having a signal level corresponding to a conduction phase angle greater than the conduction phase angle of the AC voltage, for a predetermined time period.Type: GrantFiled: June 2, 2016Date of Patent: July 4, 2017Assignee: Panasonic Intellecutal Property Management Co., Ltd.Inventors: Satoshi Yagi, Kei Mitsuyasu, Shinichiro Goto, Tomohiro Sugiura, Katsuyoshi Nakada
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Publication number: 20160366741Abstract: A dimming lighting circuit includes: a rectifier circuit; a phase detection circuit which outputs a dimming signal having a signal level corresponding to a conduction phase angle of an AC voltage; and a DC-DC converter which receives a DC voltage output from the rectifier circuit and supplies a light source with a DC current corresponding to the signal level of the dimming signal output from the phase detection circuit. If the conduction phase angle detected when the dimming lighting circuit receives the AC voltage at power-on is less than or equal to a predetermined angle, the phase detection circuit outputs, as the dimming signal, a substitute signal having a signal level corresponding to a conduction phase angle greater than the conduction phase angle of the AC voltage, for a predetermined time period.Type: ApplicationFiled: June 2, 2016Publication date: December 15, 2016Inventors: Satoshi YAGI, Kei MITSUYASU, Shinichiro GOTO, Tomohiro SUGIURA, Katsuyoshi NAKADA
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Patent number: 9369053Abstract: In a power supply device, a primary winding of a transformer is connected in series to a main switching element, and is connected in parallel to a series circuit of a resonance capacitor and a sub switching element. A secondary winding of the transformer is connected in series to a series circuit of a rectifying element and a resonance inductor. The capacitance of the resonance capacitor and the inductance of the resonance inductor are each set such that, when the sub switching element is in an on state, the waveform of the voltage that is generated between the first main terminal and the second main terminal of the main switching element takes a protruding curve shape, the voltage being generated due to a resonance phenomenon of at least the resonance capacitor and the resonance inductor.Type: GrantFiled: February 20, 2015Date of Patent: June 14, 2016Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Kiyoshi Ogasawara, Takafumi Fujino, Hiromichi Goto, Teruhito Takeda, Satohiko Hosomi, Kei Mitsuyasu, Katsuyuki Doi, Hideaki Abe
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Publication number: 20150249397Abstract: In a power supply device, a primary winding of a transformer is connected in series to a main switching element, and is connected in parallel to a series circuit of a resonance capacitor and a sub switching element. A secondary winding of the transformer is connected in series to a series circuit of a rectifying element and a resonance inductor. The capacitance of the resonance capacitor and the inductance of the resonance inductor are each set such that, when the sub switching element is in an on state, the waveform of the voltage that is generated between the first main terminal and the second main terminal of the main switching element takes a protruding curve shape, the voltage being generated due to a resonance phenomenon of at least the resonance capacitor and the resonance inductor.Type: ApplicationFiled: February 20, 2015Publication date: September 3, 2015Inventors: Kiyoshi OGASAWARA, Takafumi FUJINO, Hiromichi GOTO, Teruhito TAKEDA, Satohiko HOSOMI, Kei MITSUYASU, Katsuyuki DOI, Hideaki ABE
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Patent number: 8648544Abstract: An illumination lighting apparatus is connected to, as an external apparatus, any of a human body sensing sensor configured to detect presence/absence of a person, an illuminance sensor configured to detect space illuminance, and a dimmer which arbitrarily adjusts the space illuminance, and is configured to produce an output control signal for controlling an optical output of a light source based on a signal output from the external apparatus. The illumination lighting apparatus includes: an external apparatus determining unit configured to determine which kind of the external apparatus is connected based on the signal output from the external apparatus; and a signal processing unit configured to produce the output control signal based on the signal output from the external apparatus.Type: GrantFiled: June 15, 2009Date of Patent: February 11, 2014Assignee: Panasonic CorporationInventors: Tomohiro Sasakawa, Naoki Onishi, Masafumi Yamamoto, Keisuke Ueda, Katsunobu Hamamoto, Kei Mitsuyasu
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Patent number: 8564210Abstract: A light source module includes a substrate unit for mounting multiple light emitting diodes thereon to electrically connecting them; first and second electrical connecting terminals for supplying a current to the light emitting diodes based on a voltage applied from outside the substrate unit; and a characteristic setting unit for presetting characteristic information corresponding to a electrical characteristic of the light emitting diodes. Further, the light source module includes a third electrical connecting terminal for outputting a setting signal based on the characteristic information preset in the characteristic setting unit, and the characteristic setting unit is connected at least between the third and first electrical connecting terminals or between the third and second electrical connecting terminals, and the characteristic setting unit responds to a set-up power inputted from the third electrical connecting terminal to generate the setting signal.Type: GrantFiled: February 28, 2011Date of Patent: October 22, 2013Assignee: Panasonic CorporationInventors: Katunobu Hamamoto, Akira Horiguchi, Hiroshi Sugawara, Kei Mitsuyasu
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Publication number: 20110248637Abstract: An illumination device includes a replaceable lamp including at least one light emitting element; a lighting device for lighting the light emitting element by supplying a power to the lamp; and an illuminance correction unit for performing a dimming control on the lamp. The illuminance correction unit includes a timer for counting a cumulative lighting time of the light emitting element and a memory for storing the cumulative lighting time counted by the timer. The illuminance correction unit determines a dimming ratio of the light emitting element based on the cumulative lighting time stored in the memory and an illuminance correction characteristic, in which the relationship between the cumulative lighting time and the dimming ratio of the light emitting element is determined to uniformly maintain a light output from the light emitting element even when the cumulative lighting time increases. The memory is provided in the lamp.Type: ApplicationFiled: March 30, 2011Publication date: October 13, 2011Applicant: Panasonic Electric Works Co., Ltd.Inventors: Kei MITSUYASU, Katunobu Hamamoto
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Publication number: 20110210675Abstract: A light source module includes a substrate unit for mounting multiple light emitting diodes thereon to electrically connecting them; first and second electrical connecting terminals for supplying a current to the light emitting diodes based on a voltage applied from outside the substrate unit; and a characteristic setting unit for presetting characteristic information corresponding to a electrical characteristic of the light emitting diodes. Further, the light source module includes a third electrical connecting terminal for outputting a setting signal based on the characteristic information preset in the characteristic setting unit, and the characteristic setting unit is connected at least between the third and first electrical connecting terminals or between the third and second electrical connecting terminals, and the characteristic setting unit responds to a set-up power inputted from the third electrical connecting terminal to generate the setting signal.Type: ApplicationFiled: February 28, 2011Publication date: September 1, 2011Applicant: Panasonic Electric Works Co., Ltd.Inventors: Katunobu Hamamoto, Akira Horiguchi, Hiroshi Sugawara, Kei Mitsuyasu
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Publication number: 20110095698Abstract: An illumination lighting apparatus is connected to, as an external apparatus, any of a human body sensing sensor configured to detect presence/absence of a person, an illuminance sensor configured to detect space illuminance, and a dimmer which arbitrarily adjusts the space illuminance, and is configured to produce an output control signal for controlling an optical output of a light source based on a signal output from the external apparatus. The illumination lighting apparatus includes: an external apparatus determining unit configured to determine which kind of the external apparatus is connected based on the signal output from the external apparatus; and a signal processing unit configured to produce the output control signal based on the signal output from the external apparatus.Type: ApplicationFiled: June 15, 2009Publication date: April 28, 2011Inventors: Tomohiro Sasakawa, Naoki Onishi, Masafumi Yamamoto, Keisuke Ueda, Katsunobu Hamamoto, Kei Mitsuyasu
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Patent number: 7378804Abstract: The ballast of the present invention includes a DC power supply, an inverter circuit, a load circuit, and an integrated control circuit. The integrated control circuit controls the switching elements of the DC power supply and the inverter circuit. The integrated control circuit includes a first control unit, a second control unit, and a driver circuit. The first control unit generates a first control signal for control of the switching element of the DC power supply. The second control unit generates a second control signal for control of the switching elements of the inverter circuit. The driver circuit provides drive signals for driving each one of the switching elements of said DC power supply and the inverter circuit in accordance with the first control signal and the second control signal.Type: GrantFiled: December 26, 2002Date of Patent: May 27, 2008Assignee: Matsushita Electric Works, Ltd.Inventors: Kei Mitsuyasu, Katsumi Sato, Katsunobu Hamamoto, Masahiro Yamanaka, Yoshifumi Kuroki
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Publication number: 20060158131Abstract: The ballast of the present invention includes a DC power supply, an inverter circuit, a load circuit, and an integrated control circuit. The integrated control circuit controls the switching elements of the DC power supply and the inverter circuit. The integrated control circuit includes a first control unit, a second control unit, and a driver circuit. The first control unit generates a first control signal for control of the switching element of the DC power supply. The second control unit generates a second control signal for control of the switching elements of the inverter circuit. The driver circuit provides drive signals for driving each one of the switching elements of said DC power supply and the inverter circuit in accordance with the first control signal and the second control signal.Type: ApplicationFiled: December 26, 2002Publication date: July 20, 2006Inventors: Kei Mitsuyasu, Katsumi Sato, Katsunobu Hamamoto, Masahiro Yamanaka, Yoshifumi Kuroki
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Patent number: 5502423Abstract: A discharge lamp lighting device has first switching means for converting AC power into DC power and second switching means for converting the DC power into a high frequency power, the first switching means being driven subsequently to a driving of the second switching means, and the device is arranged for intermittently applying a pulse voltage to a discharge lamp during its dimming lighting, whereby any secondary voltage can be effectively lowered and any flash apt to occur during the dimming lighting can be restrained.Type: GrantFiled: April 22, 1994Date of Patent: March 26, 1996Assignee: Matsushita Electric Works, Ltd.Inventors: Akio Okude, Tokushi Yamauchi, Kei Mitsuyasu, Yoshifumi Kuroki, Naoki Ohnishi, Katsuyuki Kiyozumi